JWTechsol Posted April 30, 2012 Report Share Posted April 30, 2012 Hello, I have a Jazz OPLC which I want to use as a MODBUS master, to read from, and write to 3 inverters on an RS485 modbus network. I have downloaded a U90 sample program from a thread on the foum, which has enabled MODBUS comms on the Jazz. It now reads a value from Node 2 on the network. Now I cannot get U90 Ladder to re-connect to the Jazz. I know this is because you cannot have 2 comms paths into the Jazz, but how do I put code in there to re-enable RS232 comms? What do I do? Quote Link to comment Share on other sites More sharing options...
Emil Posted April 30, 2012 Report Share Posted April 30, 2012 Please try first to stop the controller from Info mode > System. Then - change the Modbus config command from 600 to 599. This will let you to communicate with U90Ladder even the port is configured as Modbus. Of course - you have only one port. If you switch ot PCOM (Unitronics native protocol), then it will take about one minute to Jazz ot return to predefined Modbus settings. Quote Link to comment Share on other sites More sharing options...
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